A strategic management game, best described as a sci-fi tower defence game with moving spaceships and configurable units. Design your own ships from a series of hulls+modular components, group the ships into a fleet, give the fleet orders and positions and then watch it engage in OTT gratuitous space battles against enemy fleets.
This is a snapshot of nvidia's perfHUD tool being used to draw a single frame of a bettle in Gratuitous Space Battles. You can see each object being drawn and the textures used by the engine to render each component in the scene.